T16608 tests fail on Darwin
--- driver/T16608/T16608_2.run/T16608_2.stdout.normalised 2019-06-21 23:15:43.000000000 -0700
+++ driver/T16608/T16608_2.run/T16608_2.run.stdout.normalised 2019-06-21 23:15:43.000000000 -0700
@@ -2,6 +2,4 @@
[2 of 2] Compiling Main ( T16608_2.hs, T16608_2.o )
Linking T16608_2 ...
41
-[1 of 2] Compiling MyInteger ( MyInteger.hs, MyInteger.o )
-Linking T16608_2 ...
-42
+41